CN106397704A - Process for producing melamine foam sponge - Google Patents
Process for producing melamine foam sponge Download PDFInfo
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- CN106397704A CN106397704A CN201610853958.4A CN201610853958A CN106397704A CN 106397704 A CN106397704 A CN 106397704A CN 201610853958 A CN201610853958 A CN 201610853958A CN 106397704 A CN106397704 A CN 106397704A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
- C08G12/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
- C08G12/30—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds with substituted triazines
- C08G12/32—Melamines
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/141—Hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/143—Halogen containing compounds
- C08J9/147—Halogen containing compounds containing carbon and halogen atoms only
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
- C08J2203/142—Halogenated saturated hydrocarbons, e.g. H3C-CF3
- C08J2203/144—Perhalogenated saturated hydrocarbons, e.g. F3C-CF3
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/18—Binary blends of expanding agents
- C08J2203/182—Binary blends of expanding agents of physical blowing agents, e.g. acetone and butane
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2361/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
- C08J2361/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08J2361/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
- C08J2361/28—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds with melamine
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Abstract
The invention discloses a process for producing melamine foam sponge, comprising the steps of mixing well melamine and paraformaldehyde; pumping the mixture to a first screw unit by a material pump, and adding alkali liquid to a feed port of the first screw unit; adding auxiliary solution to the feed end, middle or tail end of the first screw unit; feeding to a second screw unit, transparent resin extruded from an outlet of the first screw unit, and continuing polymerization in the second screw unit; allowing transparent resin from the tail of the second screw unit to pass through a cooling device and then enter a third screw unit; introducing a foaming agent, an emulsifying agent, a stabilizer and a curing agent from the middle of the third screw unit, and mixing well with the resin; introducing the mixed resin to a microwave foaming furnace for foaming to form high-porosity melamine foam sponge; the process of the invention makes high use of materials, has high yield, and can provide continuous production of melamine foam sponge with stable quality and high porosity.
Description
Technical field
The present invention relates to technical field of organic synthesis, particularly to a kind of production technology of melamine foamed plastic sponge.
Background technology
Melamine resin, also known as melamine resin (melamine-formaldehyde resin), melamine formaldehyde (MF) tree
Fat, is the polymer obtained by tripolycyanamide is reacted with formaldehyde.Reaction is crosslinked, product is insoluble thermosetting during machine-shaping
Property resin, traditionally often it is referred to as amino resins with Lauxite.
Melamine foamed plastic sponge refers to can be made into melamino-formaldehyde foam using melamine resin through foamable reaction, this
Foam is nonflammable, water-fast, heat-resisting, ageing-resistant, resistance to electric arc, resistance to chemical attack, has good insulating properties, glossiness and machinery strong
Degree, also has good sound-absorbing effect simultaneously.Therefore, it is widely used in the sound-absorbing of building, automobile or even aircraft carrier, submarine etc.
Fire-retardant.
At present, existing melamine resin produces the batch production method that mainly adopts, and the capital equipment of the method is reaction
Kettle, long the production cycle, prepared resin viscosity is big, and the melamine foamed plastic sponge of follow-up preparation has that fragility is big, easy dry linting, draw
Stretch the low factor of tear strength, cause product utilization rate low.
Content of the invention
The present invention provides a kind of production technology of melamine foamed plastic sponge, solves existing melamine foamed plastic sponge crisp
Property big, easy dry linting, the stretching low problem of tear strength.
For solving above-mentioned technical problem, the technical scheme is that：
A kind of production technology of melamine foamed plastic sponge, comprises the following steps：
(1) tripolycyanamide and paraformaldehyde, mix homogeneously are taken；
(2) mixed material inputs the first screw machine by product pump, adds alkali liquor, make inside at the first screw rod machine inlet
The pH value of material between 8～10, reacted in conveying mixed process by reaction system, and the response time is 5～10min, instead
Temperature is answered to be 80～160 DEG C；
(3) add adjuvant solution in the first screw machine feed end, centre position or end；
(4) from first screw machine outlet extrusion transparent resin enter the second screw machine, continue in the second screw machine into
Row polyreaction, the response time is 25～45min, and reaction temperature is 65～95 DEG C, generates melamine resin；
(5) from the second screw rod drive end unit, transparent resin out enters the 3rd screw machine, the 3rd spiral shell after heat sink
Bar machine is cooled down using recirculated cooling water；
(6) foaming agent, emulsifying agent, stabilizer and firming agent are passed through in the middle part of the 3rd screw machine, uniform with mixed with resin；
(7) resin of mix homogeneously is passed through foaming in microwave foaming furnace, forms the melamine foamed plastic sea of high opening rate
Continuous.
Wherein it is preferred to, described tripolycyanamide is 1 with the mol ratio of described paraformaldehyde：2～4.
Wherein it is preferred to, described alkali liquor for concentration be 0.2～0.5% organic base and inorganic base aqueous solution.
Wherein it is preferred to, the inorganic sodium aqueous solution of one or more that described adjuvant solution is 10～45% for concentration.
Wherein it is preferred to, described inorganic sodium is sodium sulfite, sodium sulfite, sodium pyrosulfite, sodium sulfate or carbonic acid
Sodium.
Wherein it is preferred to, the addition of described adjuvant solution is 0.01～0.1g/g with respect to mixed material.Wherein, excellent
Selection of land, described foaming agent is pentane, normal hexane, any one or a few in dichlorotetra-fluoroethane；Described emulsifying agent is benzene
In sodium sulfonate, dodecylbenzene sodium sulfonate, OP-10 any one or a few；Described firming agent is formic acid or acetic acid；Described stable
Agent is polysiloxanes, organotin, antimony organic, rare earth or Organic fluoride.
Wherein it is preferred to, the addition of described foaming agent, emulsifying agent, firming agent and stabilizer is with respect to from the second screw rod
Drive end unit out transparent resin be respectively 0.05～0.1g/g, 0.02～0.05g/g, 0.02～0.05g/g and 0.02～
0.05g/g.
Wherein it is preferred to, the drop temperature of described 3rd screw machine is 30～40 DEG C.
Beneficial effects of the present invention：
1. the present invention is reacted using response type screw machine, by controlling the rotating speed of screw rod, can efficiently control anti-
Between seasonable, and tripolycyanamide can be made quickly to mix with paraformaldehyde solution reaction system, emulsifying and reaction, thus it is steady to obtain quality
Fixed melamine resin, prepared melamine resin viscosity is between 5000mPa s～12000mPa s, is relatively suitable for foaming, uses
To prepare melamine foamed plastic sponge.
2. the melamine foamed plastic sponge fragility of present invention preparation is little, be difficult dry linting, draw that to stretch tearing strength high, effectively solves
Determine problems of the prior art, and made melamine foamed plastic sponge have good mechanical performance and fire-retardant sound-deadening properties
Energy.Prepare melamine foamed plastic sponge perforate uniformly, foam density >=8kg/m3, tensile strength >=120KPa, elongation at break
>=40%, tearing strength >=40N/m, rebound degree >=65%.
3. the melamine foamed plastic sponge production technology raw material availability of the present invention is high, energy consumption is low, high income, three wastes are produced
Raw, can the continuous stable melamine foamed plastic sponge of the quality of production, and melamine foamed plastic sponge percent opening height.
4. continuity of production process of the present invention is good, and action required personnel are few, high degree of automation.
Specific embodiment
Below the embodiment it is clear that described is clearly and completely described to the technical scheme in the embodiment of the present invention
It is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the common skill in this area
The every other embodiment that art personnel are obtained under the premise of not making creative work, broadly falls into the model of present invention protection
Enclose.
Embodiment 1
The present embodiment provides a kind of production technology of melamine foamed plastic sponge, comprises the following steps：
(1) mol ratio is taken to be 1：3 tripolycyanamide and paraformaldehyde, mix homogeneously；
(2) mixed material inputs the first screw machine by product pump, adds 0.3% NaOH at the first screw rod machine inlet
Aqueous solution, the pH value making materials inside is 9, and reaction system is reacted in conveying mixed process, and the response time is 8min, instead
Temperature is answered to be 120 DEG C；
(3) one or more of 20% of sodium sulfite is added in the first screw machine feed end, centre position or end
Aqueous solution；The addition of adjuvant solution is 0.05g/g with respect to mixed material.
(4) from first screw machine outlet extrusion transparent resin enter the second screw machine, continue in the second screw machine into
Row polyreaction, the response time is 35min, and reaction temperature is 80 DEG C, generates melamine resin；The melamine resin that the present embodiment is obtained
Viscosity is 8000mPa s (25 DEG C).
(5) from the second screw rod drive end unit, transparent resin out enters the 3rd screw machine, the 3rd spiral shell after heat sink
Bar machine is cooled down using recirculated cooling water；
(6) foaming agent, emulsifying agent, stabilizer and firming agent are passed through in the middle part of the 3rd screw machine, with mixed with resin uniformly,
The drop temperature of the 3rd screw machine is 35 DEG C；
(7) resin of mix homogeneously is passed through foaming in microwave foaming furnace, forms the melamine foamed plastic sea of high opening rate
Continuous.
Wherein, described blowing agent composition weight is 2:1 is pentane and normal hexane；Described emulsifying agent is 1:2 detergent alkylate sulphurs
Sour sodium and OP-10；Described firming agent is formic acid；Described stabilizer is polysiloxanes.
Wherein, the addition of described foaming agent, emulsifying agent, firming agent and stabilizer goes out with respect to from the second screw rod drive end unit
Carry out transparent resin and be respectively 0.08g/g, 0.04g/g, 0.03g/g and 0.04g/g.
Foam density 12kg/m3 of melamine resin foam that the present embodiment is obtained, tensile strength 140KPa, disconnected
Split percentage elongation 50%, tearing strength 42N/m, rebound degree 63%.
Embodiment 2
The present embodiment provides a kind of production technology of melamine foamed plastic sponge, comprises the following steps：
(1) mol ratio is taken to be 1：2 tripolycyanamide and paraformaldehyde, mix homogeneously；
(2) mixed material inputs the first screw machine by product pump, adds 0.2% three second at the first screw rod machine inlet
Amine aqueous solution, the pH value making materials inside is 8, and reaction system is reacted in conveying mixed process, and the response time is
10min, reaction temperature is 80 DEG C；
(3) add one or more of 10% of sodium sulfite molten in the first screw machine feed end, centre position or end
Liquid；The addition of adjuvant solution is 0.1g/g with respect to mixed material.
(4) from first screw machine outlet extrusion transparent resin enter the second screw machine, continue in the second screw machine into
Row polyreaction, the response time is 25min, and reaction temperature is 95 DEG C, generates melamine resin；The melamine resin that the present embodiment is obtained
Viscosity is 7000mPa s (25 DEG C).
(5) from the second screw rod drive end unit, transparent resin out enters the 3rd screw machine, the 3rd spiral shell after heat sink
Bar machine is cooled down using recirculated cooling water；
(6) foaming agent, emulsifying agent, stabilizer and firming agent are passed through in the middle part of the 3rd screw machine, with mixed with resin uniformly,
The drop temperature of the 3rd screw machine is 30 DEG C；
(7) resin of mix homogeneously is passed through foaming in microwave foaming furnace, forms the melamine foamed plastic sea of high opening rate
Continuous.
Wherein, described foaming agent is weight ratio for 1:1 normal hexane and dichloro-tetrafluoro；Described emulsifying agent weight is than for benzene sulphur
Sour sodium and dodecylbenzene sodium sulfonate；Described firming agent is acetic acid；Described stabilizer is organotin.
Wherein, the addition of described foaming agent, emulsifying agent, firming agent and stabilizer goes out with respect to from the second screw rod drive end unit
Carry out transparent resin and be respectively 0.1g/g, 0.02g/g, 0.05g/g and 0.05g/g.
The present embodiment be obtained foam density 12kg/m3 of melamine resin foam, tensile strength >=140KPa,
Elongation at break 60%, tearing strength 45N/m, rebound degree 70%.
Embodiment 3
The present embodiment provides a kind of production technology of melamine foamed plastic sponge, comprises the following steps：
(1) mol ratio is taken to be 1：4 tripolycyanamide and paraformaldehyde, mix homogeneously；
(2) mixed material inputs the first screw machine by product pump, adds 0.5% NaOH at the first screw rod machine inlet
Aqueous solution, the pH value making materials inside is 10, and reaction system is reacted in conveying mixed process, and the response time is 5min,
Reaction temperature is 160 DEG C；
(3) one or more of 45% of sodium pyrosulfite is added in the first screw machine feed end, centre position or end
Aqueous solution；The addition of metabisulfite solution is 0.01g/g with respect to mixed material.
(4) from first screw machine outlet extrusion transparent resin enter the second screw machine, continue in the second screw machine into
Row polyreaction, the response time is 45min, and reaction temperature is 65 DEG C, generates melamine resin；The melamine resin that the present embodiment is obtained
Viscosity is 5000mPa s (25 DEG C).
(5) from the second screw rod drive end unit, transparent resin out enters the 3rd screw machine, the 3rd spiral shell after heat sink
Bar machine is cooled down using recirculated cooling water；
(6) foaming agent, emulsifying agent, stabilizer and firming agent are passed through in the middle part of the 3rd screw machine, with mixed with resin uniformly,
The drop temperature of the 3rd screw machine is 40 DEG C；
(7) resin of mix homogeneously is passed through foaming in microwave foaming furnace, forms the melamine foamed plastic sea of high opening rate
Continuous.
Wherein, described foaming agent is pentane；Described emulsifying agent is dodecylbenzene sodium sulfonate；Described firming agent is first
Acid；Described stabilizer is antimony organic.
Wherein, the addition of described foaming agent, emulsifying agent, firming agent and stabilizer goes out with respect to from the second screw rod drive end unit
Carry out transparent resin and be respectively 0.05g/g, 0.05g/g, 0.02g/g and 0.02g/g.
The present embodiment be obtained foam density 10kg/m3 of melamine resin foam, tensile strength >=160KPa,
Elongation at break 40%, tearing strength 55N/m, rebound degree 70%.
Embodiment 4
The present embodiment provides a kind of production technology of melamine foamed plastic sponge, comprises the following steps：
(1) mol ratio is taken to be 1：3 tripolycyanamide and paraformaldehyde, mix homogeneously；
(2) mixed material inputs the first screw machine by product pump, adds 0.3% NaOH at the first screw rod machine inlet
Aqueous solution, the pH value making materials inside is 9, and reaction system is reacted in conveying mixed process, and the response time is 8min, instead
Temperature is answered to be 140 DEG C；
(3) 30% aqueous sodium persulfate solution is added in the first screw machine feed end, centre position or end；Aqueous sodium sulfate
The addition of liquid is 0.04g/g with respect to mixed material.
(4) from first screw machine outlet extrusion transparent resin enter the second screw machine, continue in the second screw machine into
Row polyreaction, the response time is 40min, and reaction temperature is 70 DEG C, generates melamine resin；The melamine resin that the present embodiment is obtained
Viscosity is 12000mPa s (25 DEG C).
(5) from the second screw rod drive end unit, transparent resin out enters the 3rd screw machine, the 3rd spiral shell after heat sink
Bar machine is cooled down using recirculated cooling water；
(6) foaming agent, emulsifying agent, stabilizer and firming agent are passed through in the middle part of the 3rd screw machine, with mixed with resin uniformly,
The drop temperature of the 3rd screw machine is 32 DEG C；
(7) resin of mix homogeneously is passed through foaming in microwave foaming furnace, forms the melamine foamed plastic sea of high opening rate
Continuous.
Wherein, described foaming agent is dichlorotetra-fluoroethane；Described emulsifying agent is benzene sulfonic acid sodium salt；Described firming agent is formic acid；
Described stabilizer is rare earth.
Wherein, the addition of described foaming agent, emulsifying agent, firming agent and stabilizer goes out with respect to from the second screw rod drive end unit
Carry out transparent resin and be respectively 0.07g/g, 0.04g/g, 0.04g/g and 0.03g/g.
Foam density 8kg/m3 of melamine resin foam that the present embodiment is obtained, tensile strength 135KPa, disconnected
Split percentage elongation 45%, tearing strength 42N/m, rebound degree 78%.
Embodiment 5
The present embodiment provides a kind of production technology of melamine foamed plastic sponge, comprises the following steps：
(1) mol ratio is taken to be 1：3 tripolycyanamide and paraformaldehyde, mix homogeneously；
(2) mixed material inputs the first screw machine by product pump, adds 0.3% three second at the first screw rod machine inlet
Amine aqueous solution, the pH value making materials inside is 10, and reaction system is reacted in conveying mixed process, and the response time is
8min, reaction temperature is 100 DEG C；
(3) one or more of 40% of sodium carbonate liquor is added in the first screw machine feed end, centre position or end；
The addition of sodium carbonate is 0.01～0.1g/g with respect to mixed material.
(4) from first screw machine outlet extrusion transparent resin enter the second screw machine, continue in the second screw machine into
Row polyreaction, the response time is 30min, and reaction temperature is 90 DEG C, generates melamine resin；The melamine resin that the present embodiment is obtained
Viscosity is 7000mPa s (25 DEG C).
(5) from the second screw rod drive end unit, transparent resin out enters the 3rd screw machine, the 3rd spiral shell after heat sink
Bar machine is cooled down using recirculated cooling water；
(6) foaming agent, emulsifying agent, stabilizer and firming agent are passed through in the middle part of the 3rd screw machine, with mixed with resin uniformly,
The drop temperature of the 3rd screw machine is 38 DEG C；
(7) resin of mix homogeneously is passed through foaming in microwave foaming furnace, forms the melamine foamed plastic sea of high opening rate
Continuous.
Wherein, described foaming agent is pentane；Described emulsifying agent is benzene sulfonic acid sodium salt；Described firming agent is acetic acid；Described steady
Determining agent is Organic fluoride.
Wherein, the addition of described foaming agent, emulsifying agent, firming agent and stabilizer goes out with respect to from the second screw rod drive end unit
Carry out transparent resin and be respectively 0.08g/g, 0.03g/g, 0.04g/g and 0.03g/g.
The present embodiment be obtained foam density 12kg/m3 of melamine resin foam, tensile strength >=140KPa,
Elongation at break 55%, tearing strength 45N/m, rebound degree 80%.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (9)
1. a kind of production technology of melamine foamed plastic sponge is it is characterised in that comprise the following steps：
(1) tripolycyanamide and paraformaldehyde, mix homogeneously are taken；
(2) mixed material inputs the first screw machine by product pump, adds alkali liquor, make materials inside at the first screw rod machine inlet
PH value between 8～10, reaction system conveying mixed process in reacted, the response time be 5～10min, reaction temperature
Spend for 80～160 DEG C；
(3) add adjuvant solution in the first screw machine feed end, centre position or end；
(4) transparent resin from the first screw machine outlet extrusion enters the second screw machine, proceeds to gather in the second screw machine
Close reaction, the response time is 25～45min, reaction temperature is 65～95 DEG C, generates melamine resin；
(5) from the second screw rod drive end unit, transparent resin out enters the 3rd screw machine, the 3rd screw machine after heat sink
Cooled down using recirculated cooling water；
(6) foaming agent, emulsifying agent, stabilizer and firming agent are passed through in the middle part of the 3rd screw machine, uniform with mixed with resin；
(7) resin of mix homogeneously is passed through foaming in microwave foaming furnace, forms the melamine foamed plastic sponge of high opening rate.
2. a kind of melamine foamed plastic sponge according to claim 1 production technology it is characterised in that：Described melamine
Amine is 1 with the mol ratio of described paraformaldehyde：2～4.
3. a kind of melamine foamed plastic sponge according to claim 1 production technology it is characterised in that：Described alkali liquor is
Concentration is 0.2～0.5% organic base and the aqueous solution of inorganic base.
4. a kind of melamine foamed plastic sponge according to claim 1 production technology it is characterised in that：Described adjuvant is molten
The inorganic sodium aqueous solution of one or more that liquid is 10～45% for concentration.
5. a kind of melamine foamed plastic sponge according to claim 4 production technology it is characterised in that：Described inorganic sodium
Salt is sodium sulfite, sodium sulfite, sodium pyrosulfite, sodium sulfate or sodium carbonate.
6. a kind of melamine foamed plastic sponge according to claim 4 production technology it is characterised in that：Described adjuvant is molten
The addition of liquid is 0.01～0.1g/g with respect to mixed material.
7. a kind of melamine foamed plastic sponge according to claim 1 production technology it is characterised in that：Described foaming agent
For any one or a few in pentane, normal hexane, dichlorotetra-fluoroethane；Described emulsifying agent is benzene sulfonic acid sodium salt, dodecyl
In benzene sulfonic acid sodium salt, OP-10 any one or a few；Described firming agent is formic acid or acetic acid；Described stabilizer is polysiloxanes, has
Machine stannum, antimony organic, rare earth or Organic fluoride.
8. a kind of melamine foamed plastic sponge according to claim 7 production technology it is characterised in that：Described foaming
The addition of agent, emulsifying agent, firming agent and stabilizer is with respect to from the second screw rod drive end unit, out transparent resin is respectively 0.05
～0.1g/g, 0.02～0.05g/g, 0.02～0.05g/g and 0.02～0.05g/g.
9. a kind of melamine foamed plastic sponge according to claim 1 production technology it is characterised in that：Described 3rd spiral shell
The drop temperature of bar machine is 30～40 DEG C.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107880486A (en) * | 2017-12-30 | 2018-04-06 | 郑州峰泰纳米材料有限公司 | A kind of hard melamine steeps the preparation method of continuous plate |
| CN107987466A (en) * | 2017-12-31 | 2018-05-04 | 郑州峰泰纳米材料有限公司 | It is a kind of to produce the continuous method of melamine bubble |
| CN109438749A (en) * | 2018-10-09 | 2019-03-08 | 河南骏化发展股份有限公司 | A kind of hydrophobicity melamine formaldehyde resin foam plastics and preparation method thereof |
| CN111621140A (en) * | 2020-04-29 | 2020-09-04 | 中设设计集团环境科技有限公司 | Foaming sponge filler and preparation method thereof |
| CN113185745A (en) * | 2021-04-08 | 2021-07-30 | 峰特(浙江)新材料有限公司 | Melamine formaldehyde foam with inorganic filler |
| CN113185744A (en) * | 2021-04-08 | 2021-07-30 | 孚莱孚(上海)新材料有限公司 | Melamine formaldehyde foam with high flexibility |
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| CN105731857A (en) * | 2016-02-20 | 2016-07-06 | 深圳爱易瑞科技有限公司 | Novel sulfonation melamino-formaldehyde resin and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107880486A (en) * | 2017-12-30 | 2018-04-06 | 郑州峰泰纳米材料有限公司 | A kind of hard melamine steeps the preparation method of continuous plate |
| CN107987466A (en) * | 2017-12-31 | 2018-05-04 | 郑州峰泰纳米材料有限公司 | It is a kind of to produce the continuous method of melamine bubble |
| CN109438749A (en) * | 2018-10-09 | 2019-03-08 | 河南骏化发展股份有限公司 | A kind of hydrophobicity melamine formaldehyde resin foam plastics and preparation method thereof |
| CN111621140A (en) * | 2020-04-29 | 2020-09-04 | 中设设计集团环境科技有限公司 | Foaming sponge filler and preparation method thereof |
| CN113185745A (en) * | 2021-04-08 | 2021-07-30 | 峰特(浙江)新材料有限公司 | Melamine formaldehyde foam with inorganic filler |
| CN113185744A (en) * | 2021-04-08 | 2021-07-30 | 孚莱孚(上海)新材料有限公司 | Melamine formaldehyde foam with high flexibility |
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